CN113315360A - Anti-transient-outage power supply and equipment based on capacitor boosting energy storage - Google Patents
Anti-transient-outage power supply and equipment based on capacitor boosting energy storage Download PDFInfo
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- CN113315360A CN113315360A CN202110497874.2A CN202110497874A CN113315360A CN 113315360 A CN113315360 A CN 113315360A CN 202110497874 A CN202110497874 A CN 202110497874A CN 113315360 A CN113315360 A CN 113315360A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 91
- 238000004146 energy storage Methods 0.000 title claims abstract description 67
- 238000012544 monitoring process Methods 0.000 claims abstract description 49
- 230000005669 field effect Effects 0.000 claims description 44
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000001052 transient effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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Abstract
The invention discloses an anti-instantaneous-disconnection power supply and equipment based on capacitor boosting energy storage. The invention designs a power supply based on capacitor boosting and energy storage, an external power supply circuit and an energy storage capacitor power supply circuit are arranged in the power supply circuit, based on the external power supply circuit, the input voltage of the external power supply is filtered by an input module to obtain a first voltage, the first voltage is converted into a required second voltage by a first control module, the second voltage is filtered by an output module and then output, based on the energy storage capacitor power supply circuit, the first voltage is boosted by a boosting and charging module to obtain a third voltage to charge an internal energy storage capacitor, when the external power supply circuit is interrupted suddenly, a monitoring module triggers a switching module to switch to the energy storage capacitor for power supply, the third voltage is converted into the required second voltage by the switching module and a second control module, the second voltage is filtered by an output module and then output, thereby the voltage of the capacitor can be boosted under the condition that the capacitance value of a device is limited, the anti-instantaneous-disconnection capability of the power supply is improved.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to an anti-instantaneous-disconnection power supply and equipment based on capacitor boosting energy storage.
Background
In the field of power supply technology, in order to increase the reliability of application devices, a capacitor is usually added at the input end of a power supply loop to prevent the application devices from malfunctioning when the power supply loop fluctuates instantaneously. In practice, the start and stop of the high-power device may cause instantaneous fluctuation of the power supply loop, even tens of milliseconds of power supply interruption. Although the capacitor in the power supply loop can eliminate the instantaneous fluctuation, in the power supply application with larger power, if the power supply interruption lasts for tens of milliseconds, the energy storage of the capacitor needs to be increased, for example, energy storage devices such as the capacitor are further added. Because the stored energy of the capacitor is in direct proportion to the square of the voltage, how to improve the anti-instantaneous-disconnection capability of the power supply becomes a big problem to be solved at present under the condition that the capacitance value of the device is limited.
Disclosure of Invention
The invention provides a transient interruption resistant power supply and equipment based on capacitor boosting and energy storage, which can raise the voltage of a capacitor under the condition that the capacitance of a device is limited, and realize the improvement of transient interruption resistant capability of the power supply.
In order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides an anti-transient-outage power supply based on capacitor voltage boosting and energy storage, including an input module, a first control module, a voltage boosting and charging module, a monitoring module, a switching module, a second control module, and an output module;
the voltage output end of the input module is connected with the voltage input end of the output module through the first control module; the voltage output end of the input module is also connected with the voltage input end of the boost charging module and the first voltage input end of the monitoring module respectively, the voltage output end of the boost charging module is connected with the second voltage input end of the monitoring module and the voltage input end of the switching module respectively, the signal output end of the monitoring module is connected with the signal input end of the switching module, and the voltage output end of the switching module is connected with the voltage input end of the output module through the second control module;
the input module is used for filtering input voltage of an external power supply and outputting the obtained first voltage to the first control module, the boosting charging module and the monitoring module respectively;
the first control module is used for converting the first voltage into a second voltage and outputting the second voltage to the output module;
the boost charging module is used for boosting the first voltage, charging an internal energy storage capacitor by using the obtained third voltage, and outputting the third voltage to the monitoring module and the switching module;
the monitoring module is used for sending a control signal to the switching module when the third voltage is used as a reference voltage and the first voltage input by the input module is monitored to be instantaneously disconnected;
the switching module is configured to switch the external power supply to the energy storage capacitor for supplying power when receiving the control signal, convert the third voltage into a fourth voltage, and output the fourth voltage to the second control module;
the second control module is configured to convert the fourth voltage into the second voltage and output the second voltage to the output module when the energy storage capacitor supplies power;
and the output module is used for filtering the second voltage and outputting the obtained output voltage.
Further, the boost charging module comprises a boost charging circuit and the energy storage capacitor;
the voltage input end of the boosting charging circuit is connected with the voltage input end of the boosting charging module, the voltage output end of the boosting charging circuit is connected with one end of the energy storage capacitor, and the other end of the energy storage capacitor is connected with the voltage output end of the boosting charging module.
Further, the output module comprises a DC/DC converter and an output filter circuit;
the voltage input end of the DC/DC converter is connected with the voltage input end of the output module, the voltage output end of the DC/DC converter is connected with the voltage input end of the output filter circuit, and the voltage output end of the output filter circuit is connected with the voltage output end of the output module.
Further, the first control module and the second control module both comprise an OR gate circuit;
and the voltage input end of the OR gate circuit is connected with the voltage input end of the first control module/the second control module, and the voltage output end of the OR gate circuit is connected with the voltage output end of the first control module/the second control module.
Further, the OR gate circuit comprises a first N-channel field effect transistor, an OR gate controller and a first filter capacitor;
the source electrode of the first N-channel field effect transistor is connected with the voltage input end of the OR GATE circuit, the drain electrode of the first N-channel field effect transistor is connected with the voltage output end of the OR GATE circuit, and the grid electrode of the first N-channel field effect transistor is connected with the GATE pin of the OR GATE controller;
the VCC pin of the OR gate controller is connected with the voltage input end of the OR gate circuit, the IN pin of the OR gate controller is connected with the source electrode of the first N-channel field effect transistor, the OUT pin of the OR gate controller is connected with the voltage output end of the OR gate circuit, and the GND pin of the OR gate controller is grounded;
one end of the first filter capacitor is connected with the voltage input end of the OR gate circuit, and the other end of the first filter capacitor is grounded.
Further, the boost charging circuit comprises a boost unit and a charging resistor;
the voltage input end of the boosting unit is connected with the voltage input end of the boosting charging circuit, the voltage output end of the boosting unit is connected with one end of the charging resistor, and the other end of the charging resistor is connected with the voltage output end of the boosting charging circuit.
Further, the monitoring module includes a first voltage dividing resistor, a second voltage dividing resistor, a current limiting resistor, a voltage stabilizing diode, a second filter capacitor, a third voltage dividing resistor, a fourth voltage dividing resistor, and a voltage comparator;
one end of the first voltage-dividing resistor is connected with a first voltage input end of the monitoring module, and the other end of the first voltage-dividing resistor is grounded through the second voltage-dividing resistor;
one end of the current-limiting resistor is connected with a second voltage input end of the monitoring module, the other end of the current-limiting resistor is connected with the cathode of the voltage-stabilizing diode, and the anode of the voltage-stabilizing diode is grounded;
one end of the second filter capacitor is connected with the cathode of the voltage stabilizing diode, and the other end of the second filter capacitor is connected with the anode of the voltage stabilizing diode;
one end of the third voltage-dividing resistor is connected with the cathode of the voltage-stabilizing diode, and the other end of the third voltage-dividing resistor is grounded through the fourth voltage-dividing resistor;
the VCC pin of the voltage comparator is connected with the cathode of the voltage stabilizing diode, the positive input pin of the voltage comparator is connected with the connection end of the third divider resistor and the fourth divider resistor, the negative input pin of the voltage comparator is connected with the connection end of the first divider resistor and the second divider resistor, the OUT pin of the voltage comparator is connected with the signal output end of the monitoring module, and the GND pin of the voltage comparator is grounded.
Further, the switching module comprises a P-channel field effect transistor, a pull-up resistor, a protection resistor and a second N-channel field effect transistor;
the source electrode of the P-channel field effect transistor is connected with the voltage input end of the switching module, and the drain electrode of the P-channel field effect transistor is connected with the voltage output end of the switching module;
one end of the pull-up resistor is connected with the source electrode of the P-channel field effect transistor, and the other end of the pull-up resistor is connected with the grid electrode of the P-channel field effect transistor;
one end of the protection resistor is connected with the grid electrode of the P-channel field effect transistor, and the other end of the protection resistor is connected with the drain electrode of the second N-channel field effect transistor;
and the grid electrode of the second N-channel field effect transistor is connected with the signal input end of the switching module, and the source electrode of the second N-channel field effect transistor is grounded.
In a second aspect, an embodiment of the invention provides an apparatus comprising an anti-glitch power supply as described above based on capacitive boost storage.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the power supply is designed based on capacitor boosting and energy storage, an external power supply circuit and an energy storage capacitor power supply circuit are arranged in the power supply circuit, based on the external power supply circuit, the input voltage of the external power supply is filtered by an input module to obtain a first voltage, the first voltage is converted into a required second voltage by a first control module, the second voltage is filtered by an output module and then output, based on the energy storage capacitor power supply circuit, the first voltage is boosted by a boosting and charging module to obtain a third voltage to charge an internal energy storage capacitor, when the power supply loop of the external power supply is interrupted momentarily, the monitoring module triggers the switching module to switch to the energy storage capacitor for power supply, the third voltage is converted into the required second voltage through the switching module and the second control module, the second voltage is output after being filtered by the output module, therefore, under the condition that the capacitance value of the device is limited, the voltage of the capacitor can be increased, and the anti-instantaneous-disconnection capability of the power supply can be improved.
Drawings
Fig. 1 is a schematic structural diagram of an anti-glitch power supply based on capacitor boosting and energy storage according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an exemplary anti-glitch power supply based on the capacitor boosting energy storage according to the first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a boost charging circuit according to a preferred embodiment of the first embodiment of the present invention;
FIG. 4 is a schematic diagram of the structure of an OR gate circuit according to a preferred embodiment of the first embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a monitoring module according to a preferred embodiment of the present invention;
fig. 6 is a schematic structural diagram of a switching module according to a preferred embodiment of the first embodiment of the present invention;
wherein, the reference numbers in the attached figures 1 and 2 of the specification are as follows:
1: an input module; 2: a first control module; 3: a boost charging module; 4: a monitoring module; 5: a switching module; 6: a second control module; 7: and an output module.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment:
as shown in fig. 1, a first embodiment provides an anti-transient-outage power supply based on capacitor boost energy storage, which includes an input module 1, a first control module 2, a boost charging module 3, a monitoring module 4, a switching module 5, a second control module 6, and an output module 7; the voltage output end of the input module 1 is connected with the voltage input end of the output module 7 through the first control module 2; the voltage output end of the input module 1 is also connected with the voltage input end of the boost charging module 3 and the first voltage input end of the monitoring module 4 respectively, the voltage output end of the boost charging module 3 is connected with the second voltage input end of the monitoring module 4 and the voltage input end of the switching module 5 respectively, the signal output end of the monitoring module 4 is connected with the signal input end of the switching module 5, and the voltage output end of the switching module 5 is connected with the voltage input end of the output module 7 through the second control module 6; the input module 1 is used for filtering input voltage of an external power supply and outputting the obtained first voltage to the first control module 2, the boost charging module 3 and the monitoring module 4 respectively; the first control module 2 is used for converting the first voltage into a second voltage and outputting the second voltage to the output module 7; the boost charging module 3 is used for boosting the first voltage, charging an internal energy storage capacitor by the obtained third voltage, and outputting the third voltage to the monitoring module 4 and the switching module 5; the monitoring module 4 is used for sending a control signal to the switching module 5 when the third voltage is used as a reference voltage and the first voltage input by the input module 1 is monitored to be instantaneously disconnected; the switching module 5 is used for switching an external power supply to the energy storage capacitor for supplying power when receiving the control signal, converting the third voltage into a fourth voltage and outputting the fourth voltage to the second control module 6; the second control module 6 is used for converting the fourth voltage into a second voltage and outputting the second voltage to the output module 7 when the energy storage capacitor supplies power; and the output module 7 is used for filtering the second voltage and outputting the obtained output voltage.
As an example, as shown in fig. 2, an external power supply loop is formed by connecting the voltage output terminal of the input module 1 with the voltage input terminal of the output module 7 via the first control module 2.
Based on the external power supply loop, the input voltage Vi of the external power supply is filtered by the input module 1 to obtain a first voltage Va, the first voltage Va is converted into a required second voltage Vb by the first control module 2, and the second voltage Vb is filtered by the output module 7 to output Vo.
Meanwhile, the voltage input end of the input module 1 is connected with the voltage input end of the boosting charging module 3 and the first voltage input end of the monitoring module 4 respectively, the voltage output end of the boosting charging module 3 is connected with the second voltage input end of the monitoring module 4 and the voltage input end of the switching module 5 respectively, the signal output end of the monitoring module 4 is connected with the signal input end of the switching module 5, and the voltage output end of the switching module 5 is connected with the voltage input end of the output module 7 through the second control module 6 to form an energy storage capacitor power supply loop.
Based on energy storage capacitor power supply circuit, external power source's input voltage Vi obtains first voltage Va after the filtering of input module 1, first voltage Va obtains third voltage Vc after the module 3 that charges that steps up and charges for inside energy storage capacitor, when the external power source power supply circuit appears the transient interruption, send control signal EN by monitoring module 4 and trigger switching module 5 and switch the energy storage capacitor power supply, third voltage Vc converts fourth voltage Ve into through switching module 5, fourth voltage Ve converts required second voltage Vb into through second control module 6, second voltage Vb outputs Vo after output module 7 filters.
The two power supply modes realize accurate controllable switching through the first control module 2 and the second control module 6, and continuous and stable power supply in the switching process is guaranteed.
The embodiment designs the power supply based on the capacitor boosting and energy storing, can boost the voltage of the capacitor under the condition that the capacitance value of the device is limited, and realizes improvement of the transient interruption resistance of the power supply.
In a preferred embodiment, the boost charging module 3 comprises a boost charging circuit and an energy storage capacitor; the voltage input end of the boost charging circuit is connected with the voltage input end of the boost charging module 3, the voltage output end of the boost charging circuit is connected with one end of the energy storage capacitor, and the other end of the energy storage capacitor is connected with the voltage output end of the boost charging module 3.
This embodiment is through setting up boost charging circuit and energy storage capacitor in boost charging module 3, utilizes boost charging circuit to boost to first voltage to carry the third voltage that obtains to energy storage capacitor and charge, can supply power with the electric energy of energy storage capacitor internal storage when external power supply appears transiently disconnected.
In a preferred implementation manner of this embodiment, the boost charging circuit includes a boost unit, a charging resistor; the voltage input end of the boosting unit is connected with the voltage input end of the boosting charging circuit, the voltage output end of the boosting unit is connected with one end of the charging resistor, and the other end of the charging resistor is connected with the voltage output end of the boosting charging circuit.
Illustratively, as shown in fig. 3, a voltage input terminal Vin of the voltage boosting unit G1 is connected to a voltage input terminal of the boost charging circuit, a voltage output terminal Vout of the voltage boosting unit G1 is connected to one terminal of a charging resistor R0, and the other terminal of the charging resistor R0 is connected to a voltage output terminal of the boost charging circuit.
It can be understood that the boost charging module 3 includes a boost unit G1, a charging resistor R0, and an energy storage capacitor, a voltage input terminal Vin of the boost unit G1 is connected to a voltage output terminal of the input module 1, a voltage output terminal Vout of the boost unit G1 is connected to one end of the energy storage capacitor through the charging resistor R0, and the other end of the energy storage capacitor is connected to a second voltage input terminal of the monitoring module 4 and a voltage input terminal of the switching module 5. Based on the loop, the first voltage Va is boosted by the boosting unit G1 to obtain a third voltage Vc, the third voltage Vc charges the energy storage capacitor through the charging resistor R0, and the third voltage Vc is output to the monitoring module 4 and the switching module 5 through the energy storage capacitor.
In a preferred embodiment, the output module 7 comprises a DC/DC converter and an output filter circuit; the voltage input end of the DC/DC converter is connected with the voltage input end of the output module 7, the voltage output end of the DC/DC converter is connected with the voltage input end of the output filter circuit, and the voltage output end of the output filter circuit is connected with the voltage output end of the output module 7.
In this embodiment, the output module 7 is provided with a DC/DC converter and an output filter circuit, the DC/DC converter is used to convert the second voltage into a fifth voltage, and the output filter circuit is used to filter the fifth voltage and output the obtained output voltage.
In the preferred embodiment, the first control module 2 and the second control module 6 each comprise an OR gate circuit; the voltage input end of the OR gate circuit is connected with the voltage input end of the first control module 2/the second control module 6, and the voltage output end of the OR gate circuit is connected with the voltage output end of the first control module 2/the second control module 6.
In a preferred implementation manner of this embodiment, the or gate circuit includes a first N-channel fet, an or gate controller, and a first filter capacitor; the source electrode of the first N-channel field effect transistor is connected with the voltage input end of the OR GATE circuit, the drain electrode of the first N-channel field effect transistor is connected with the voltage output end of the OR GATE circuit, and the grid electrode of the first N-channel field effect transistor is connected with the GATE pin of the OR GATE controller; a VCC pin of the OR gate controller is connected with a voltage input end of the OR gate circuit, an IN pin of the OR gate controller is connected with a source electrode of the first N-channel field effect transistor, an OUT pin of the OR gate controller is connected with a voltage output end of the OR gate circuit, or a GND pin of the OR gate controller is grounded; one end of the first filter capacitor is connected with the voltage input end of the OR gate circuit, and the other end of the first filter capacitor is grounded.
Illustratively, as shown in fig. 4, the source of the first N-channel fet S1 is connected to the voltage input of the or GATE, the drain of the first N-channel fet S1 is connected to the voltage output of the or GATE, and the GATE of the first N-channel fet S1 is connected to the GATE pin of the or GATE controller U1; the VCC pin of the OR gate controller U1 is connected with the voltage input end of the OR gate circuit, the IN pin of the OR gate controller U1 is connected with the source electrode of the first N-channel field effect transistor S1, the OUT pin of the OR gate controller U1 is connected with the voltage output end of the OR gate circuit, or the GND pin of the gate controller U1 is grounded; one end of the first filter capacitor C1 is connected to the voltage input of the or gate, and the other end of the first filter capacitor C1 is grounded.
It can be understood that, for the first control module 2, in the or GATE circuit, the or GATE controller U1 outputs a varying level signal from the "GATE" pin by detecting the voltage difference between the source and the drain of the first N-channel fet S1, so that the first N-channel fet S1 obtains a corresponding voltage signal, and further controls the on state of the first N-channel fet S1, that is, when the first voltage Va is higher than the second voltage Vb, the first N-channel fet S1 is turned on, and when the first voltage Va is lower than the second voltage Vb, the first N-channel fet S1 is turned off, so as to ensure that the current in the or GATE circuit can only flow from the first voltage Va side to the second voltage Vb side, thereby avoiding energy leakage of the energy storage capacitor to the external power supply circuit, and reducing the anti-transient-breaking capability of the power supply.
Similarly, for the second control module 6, in the OR GATE circuit, the OR GATE controller U1 outputs a varying level signal from the "GATE" pin by detecting the voltage difference between the source and drain of the first N-channel FET S1, so that the first N-channel FET S1 obtains a corresponding voltage signal to control the conduction state of the first N-channel FET S1, that is, when the fourth voltage Ve is higher than the second voltage Vb, the first N-channel fet S1 is turned on, when the fourth voltage Ve is lower than the second voltage Vb, the first N-channel fet S1 is turned off, so that it is ensured that the current in the or gate circuit can only flow from the fourth voltage Ve side to the second voltage Vb side, and the unidirectional flow of the current from the fourth voltage Ve side to the second voltage Vb side is ensured, thereby avoiding the overcurrent protection of the external power supply caused by the impact current of the energy storage capacitor when the or gate circuit of the first control module 2 supplies power.
The embodiment realizes accurate controllable switching of two power supply modes through the OR gate circuit, and is favorable for ensuring continuous and stable power supply in the switching process.
In a preferred embodiment, the monitoring module 4 includes a first voltage dividing resistor, a second voltage dividing resistor, a current limiting resistor, a voltage regulator diode, a second filter capacitor, a third voltage dividing resistor, a fourth voltage dividing resistor, and a voltage comparator; one end of the first voltage-dividing resistor is connected with a first voltage input end of the monitoring module 4, and the other end of the first voltage-dividing resistor is grounded through a second voltage-dividing resistor; one end of the current-limiting resistor is connected with the second voltage input end of the monitoring module 4, the other end of the current-limiting resistor is connected with the cathode of the voltage stabilizing diode, and the anode of the voltage stabilizing diode is grounded; one end of the second filter capacitor is connected with the cathode of the voltage stabilizing diode, and the other end of the second filter capacitor is connected with the anode of the voltage stabilizing diode; one end of the third voltage-dividing resistor is connected with the cathode of the voltage-stabilizing diode, and the other end of the third voltage-dividing resistor is grounded through the fourth voltage-dividing resistor; the VCC pin of the voltage comparator is connected with the cathode of the voltage stabilizing diode, the positive input pin of the voltage comparator is connected with the connecting end of the third voltage dividing resistor and the fourth voltage dividing resistor, the negative input pin of the voltage comparator is connected with the connecting end of the first voltage dividing resistor and the second voltage dividing resistor, the OUT pin of the voltage comparator is connected with the signal output end of the monitoring module 4, and the GND pin of the voltage comparator is grounded.
Illustratively, as shown in fig. 5, one end of the first voltage-dividing resistor R1 is connected to the first voltage input terminal of the monitoring module 4, and the other end of the first voltage-dividing resistor R1 is grounded through the second voltage-dividing resistor R2; one end of the current-limiting resistor R3 is connected with the second voltage input end of the monitoring module 4, the other end of the current-limiting resistor R3 is connected with the cathode of the voltage-stabilizing diode D1, and the anode of the voltage-stabilizing diode D1 is grounded; one end of the second filter capacitor C2 is connected with the cathode of the voltage stabilizing diode D1, and the other end of the second filter capacitor C2 is connected with the anode of the voltage stabilizing diode D1; one end of the third voltage-dividing resistor R4 is connected with the cathode of the voltage-stabilizing diode D1, and the other end of the third voltage-dividing resistor R4 is grounded through the fourth voltage-dividing resistor R5; the VCC pin of the voltage comparator U2 is connected to the cathode of the zener diode D1, the positive input pin ("+" pin) of the voltage comparator U2 is connected to the connection terminal Vref of the third voltage dividing resistor R4 and the fourth voltage dividing resistor R5, the negative input pin ("-" pin) of the voltage comparator U2 is connected to the connection terminal Vat of the first voltage dividing resistor R1 and the second voltage dividing resistor R2, the OUT pin of the voltage comparator U2 is connected to the signal output terminal of the monitoring module 4, and the GND pin of the voltage comparator U2 is grounded.
It can be understood that, in the monitoring module 4, the third voltage Vc generates a stable voltage Vcc through the current limiting resistor R3 by using the zener diode D1 to supply power to the voltage comparator U2, and provides a reference voltage Vref for the voltage comparator U2 through the third voltage dividing resistor R4 and the fourth voltage dividing resistor R5, the voltage value of the first voltage Va can be monitored in real time through the Vat divided by the first voltage dividing resistor R1 and the second voltage dividing resistor R2, the voltage comparator U2 compares the voltage Vat with the Vref, and can output a high-level or low-level control signal EN to control the switching circuit, that is, when the Vat is higher than the Vref, the EN is low, and when the Vat is lower than the Vref, the EN is high.
In a preferred embodiment, the switching module 5 includes a P-channel fet, a pull-up resistor, a protection resistor, and a second N-channel fet; the source electrode of the P-channel field effect transistor is connected with the voltage input end of the switching module 5, and the drain electrode of the P-channel field effect transistor is connected with the voltage output end of the switching module 5; one end of the pull-up resistor is connected with the source electrode of the P-channel field effect transistor, and the other end of the pull-up resistor is connected with the grid electrode of the P-channel field effect transistor; one end of the protection resistor is connected with the grid electrode of the P-channel field effect transistor, and the other end of the protection resistor is connected with the drain electrode of the second N-channel field effect transistor; the grid electrode of the second N-channel field effect transistor is connected with the signal input end of the switching module 5, and the source electrode of the second N-channel field effect transistor is grounded.
Illustratively, as shown in fig. 6, the source of the P-channel fet S2 is connected to the voltage input terminal of the switching module 5, and the drain of the P-channel fet S2 is connected to the voltage output terminal of the switching module 5; one end of a pull-up resistor R6 is connected with the source electrode of the P-channel field effect transistor S2, and the other end of the pull-up resistor R6 is connected with the grid electrode of the P-channel field effect transistor S2; one end of the protective resistor R7 is connected with the grid electrode of the P-channel field effect transistor S2, and the other end of the protective resistor R7 is connected with the drain electrode of the second N-channel field effect transistor S3; the gate of the second N-channel fet S3 is connected to the signal input of the switching module 5, and the source of the second N-channel fet S3 is grounded.
It can be understood that, in the switching module 5, when the control signal EN output by the monitoring module 4 is at a low level, the second N-channel fet S3 is in an off state, the P-channel fet S2 is also in an off state under the action of the pull-up resistor R6, and when the control signal EN is at a high level, the second N-channel fet S3 is in an on state, and the pull-up resistor R6 and the protection resistor R7 form a path to perform voltage division, so that the gate voltage of the P-channel fet S2 is reduced, and is changed from the off state to the on state, and the fourth voltage Ve is output.
A second embodiment provides an apparatus comprising an anti-glitch power supply based on capacitive boost storage as described in the first embodiment, and achieving the same advantageous results.
In summary, the embodiments of the present invention have the following beneficial effects:
the power supply is designed based on capacitor boosting and energy storage, an external power supply circuit and an energy storage capacitor power supply circuit are arranged in the power supply circuit, based on the external power supply circuit, the input voltage of the external power supply is filtered by an input module 1 to obtain a first voltage, the first voltage is converted into a required second voltage by a first control module 2, the second voltage is filtered by an output module 7 and then output, based on the energy storage capacitor power supply circuit, the first voltage is boosted by a boosting and charging module 3 to obtain a third voltage to charge an internal energy storage capacitor, when the external power supply circuit is momentarily broken, a monitoring module 4 triggers a switching module 5 to switch to the energy storage capacitor for power supply, the third voltage is converted into the required second voltage by the switching module 5 and a second control module 6, the second voltage is filtered by the output module 7 and then output, so that under the condition that the capacitance value of a device is limited, the voltage of the capacitor is increased, and the anti-instantaneous-disconnection capability of the power supply is improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
1. An anti-transient-outage power supply based on capacitor voltage boosting and energy storage is characterized by comprising an input module, a first control module, a voltage boosting and charging module, a monitoring module, a switching module, a second control module and an output module;
the voltage output end of the input module is connected with the voltage input end of the output module through the first control module; the voltage output end of the input module is also connected with the voltage input end of the boost charging module and the first voltage input end of the monitoring module respectively, the voltage output end of the boost charging module is connected with the second voltage input end of the monitoring module and the voltage input end of the switching module respectively, the signal output end of the monitoring module is connected with the signal input end of the switching module, and the voltage output end of the switching module is connected with the voltage input end of the output module through the second control module;
the input module is used for filtering input voltage of an external power supply and outputting the obtained first voltage to the first control module, the boosting charging module and the monitoring module respectively;
the first control module is used for converting the first voltage into a second voltage and outputting the second voltage to the output module;
the boost charging module is used for boosting the first voltage, charging an internal energy storage capacitor by using the obtained third voltage, and outputting the third voltage to the monitoring module and the switching module;
the monitoring module is used for sending a control signal to the switching module when the third voltage is used as a reference voltage and the first voltage input by the input module is monitored to be instantaneously disconnected;
the switching module is configured to switch the external power supply to the energy storage capacitor for supplying power when receiving the control signal, convert the third voltage into a fourth voltage, and output the fourth voltage to the second control module;
the second control module is configured to convert the fourth voltage into the second voltage and output the second voltage to the output module when the energy storage capacitor supplies power;
and the output module is used for filtering the second voltage and outputting the obtained output voltage.
2. The capacitive boost energy storage based anti-glitch power supply of claim 1, in which the boost charging module comprises a boost charging circuit and the energy storage capacitor;
the voltage input end of the boosting charging circuit is connected with the voltage input end of the boosting charging module, the voltage output end of the boosting charging circuit is connected with one end of the energy storage capacitor, and the other end of the energy storage capacitor is connected with the voltage output end of the boosting charging module.
3. The capacitive boost energy storage based anti-glitch power supply of claim 1, in which the output module includes a DC/DC converter and an output filter circuit;
the voltage input end of the DC/DC converter is connected with the voltage input end of the output module, the voltage output end of the DC/DC converter is connected with the voltage input end of the output filter circuit, and the voltage output end of the output filter circuit is connected with the voltage output end of the output module.
4. The capacitive boost energy storage based anti-glitch power supply of claim 1, in which the first control module and the second control module each comprise an or gate circuit;
and the voltage input end of the OR gate circuit is connected with the voltage input end of the first control module/the second control module, and the voltage output end of the OR gate circuit is connected with the voltage output end of the first control module/the second control module.
5. The capacitive boost energy storage based anti-glitch power supply of claim 4, in which the OR gate comprises a first N-channel FET, OR gate controller, a first filter capacitor;
the source electrode of the first N-channel field effect transistor is connected with the voltage input end of the OR GATE circuit, the drain electrode of the first N-channel field effect transistor is connected with the voltage output end of the OR GATE circuit, and the grid electrode of the first N-channel field effect transistor is connected with the GATE pin of the OR GATE controller;
the VCC pin of the OR gate controller is connected with the voltage input end of the OR gate circuit, the IN pin of the OR gate controller is connected with the source electrode of the first N-channel field effect transistor, the OUT pin of the OR gate controller is connected with the voltage output end of the OR gate circuit, and the GND pin of the OR gate controller is grounded;
one end of the first filter capacitor is connected with the voltage input end of the OR gate circuit, and the other end of the first filter capacitor is grounded.
6. The capacitive boost energy storage based anti-glitch power supply of claim 2, in which the boost charging circuit comprises a boost unit, a charging resistor;
the voltage input end of the boosting unit is connected with the voltage input end of the boosting charging circuit, the voltage output end of the boosting unit is connected with one end of the charging resistor, and the other end of the charging resistor is connected with the voltage output end of the boosting charging circuit.
7. The capacitor boosting energy storage based anti-glitch power supply of claim 1, wherein the monitoring module comprises a first voltage dividing resistor, a second voltage dividing resistor, a current limiting resistor, a voltage stabilizing diode, a second filter capacitor, a third voltage dividing resistor, a fourth voltage dividing resistor, and a voltage comparator;
one end of the first voltage-dividing resistor is connected with a first voltage input end of the monitoring module, and the other end of the first voltage-dividing resistor is grounded through the second voltage-dividing resistor;
one end of the current-limiting resistor is connected with a second voltage input end of the monitoring module, the other end of the current-limiting resistor is connected with the cathode of the voltage-stabilizing diode, and the anode of the voltage-stabilizing diode is grounded;
one end of the second filter capacitor is connected with the cathode of the voltage stabilizing diode, and the other end of the second filter capacitor is connected with the anode of the voltage stabilizing diode;
one end of the third voltage-dividing resistor is connected with the cathode of the voltage-stabilizing diode, and the other end of the third voltage-dividing resistor is grounded through the fourth voltage-dividing resistor;
the VCC pin of the voltage comparator is connected with the cathode of the voltage stabilizing diode, the positive input pin of the voltage comparator is connected with the connection end of the third divider resistor and the fourth divider resistor, the negative input pin of the voltage comparator is connected with the connection end of the first divider resistor and the second divider resistor, the OUT pin of the voltage comparator is connected with the signal output end of the monitoring module, and the GND pin of the voltage comparator is grounded.
8. The capacitive boost energy storage based anti-glitch power supply of claim 1, in which the switching module comprises a P-channel fet, a pull-up resistor, a protection resistor, a second N-channel fet;
the source electrode of the P-channel field effect transistor is connected with the voltage input end of the switching module, and the drain electrode of the P-channel field effect transistor is connected with the voltage output end of the switching module;
one end of the pull-up resistor is connected with the source electrode of the P-channel field effect transistor, and the other end of the pull-up resistor is connected with the grid electrode of the P-channel field effect transistor;
one end of the protection resistor is connected with the grid electrode of the P-channel field effect transistor, and the other end of the protection resistor is connected with the drain electrode of the second N-channel field effect transistor;
and the grid electrode of the second N-channel field effect transistor is connected with the signal input end of the switching module, and the source electrode of the second N-channel field effect transistor is grounded.
9. An apparatus comprising a capacitive boost energy storage based anti-glitch power supply of any one of claims 1 to 8.
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